Mechanic&#39;s combination measuring implement.



No. r705,300. Y y PATBNTED JULY 19, 1004,

A 0. II. WILLIAMS. MEGHANIGS COMBINATION MEASURING IMPLBMENT.

APPLICATION FILED JAN. 12, 1904.`

N0 MODEL. l

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PATENT OFFICE.

NIECHANICS COMBINATION MEASURING l IMPLEMENT.

SPECIFICATIO forming part of Letterslatent- No. 765,300, dated July 19,1904..

Application filed January 12, 1904. Serial No. 188,762. (No model.)

'provision of a measuring implement having' means for the adaptationthereof as an ordinary carpenters square, try-square, miter or bevelsquare, T-square, T bevel-square, gage. compass, and calipers, besidesbeing adapted for avariety of other uses, which will becompact and ofconvenient form, cheap to pro- .dnce, and accurate.

One of the principal objects of the present invention is the provisionof an improved locking-joint for the parts of the device, whereby afterit has once been adjusted accidental derangement of the legs of theimplement will be absolutely prevented and an exactitude of adjustmentinsured, this joint being arranged so that it is used whatever purposethe device may be put to.

The invention embraces those certain novel features of construction andadaptations of parts set forth fully hereinafter and recited'in theappended claim.

In the accompanying drawings, Figure 1 is a plan view showing the use ofthe invention as a square, dotted lines illustrating how the legs can berelatively adjusted. Fig. 2 is a similar view showing how one leg canloe connected to the center of the other leg. Fig. 3 represents detailsof the improved locking-joint; Fig. 4, asectional detail of thelocking-joint, showing' the clamping-screw in full lines; and Fig. l5,an enlarged detail plan of the protractor of the locking-joint.

The legs of the implement are shown at 1 and 2, being provided withsuitable scales on both sides thereof. The leg 1 has at one end a raisedcircular hub 3, having a screw-threaded opening 4 extending therethroughcentrally thereof and a plurality of diametrical grooves 5 in anydesired number. This raised protractor will preferably be graduated intotwentyfour or more regularly-spaced divisions to give any angle thatwould ordinarily be desired. The end of the rule where the protractor islocated is curved at 6, and the opening 4 is in line with the squaredend of the rule or leg 1. The leg 2 is provided at its end with acircular depressed portion 7 of proper size to suitably receive theraised hub or protractor 3, and an opening 8 extends centrally throughthis circular part 7 and in line with the end of the leg 2, while a rib9 is disposed diametrically of the circular depressed part 7 and isadapted to take into any of the di ametrical grooves 5 to lock the legs1 and 2 at the desired angle inY relation to each other. A Wing or thumbscrew 10 has its head 11 bearing on the leg 2 and its shank providedwith a blank portion 12 where passing through the opening 8 and ascrew-threaded portion 13 to engage the screw-threads of the opening 4,the point 14 of the shank extending beyond the leg 1 to constitute acenter when the device is used as a compass. of the threads 13 with thethreaded opening 4 causes the rib 9 to lock into the desired groove 5,and the locking-joint thus provided absolutely safeguards againstaccidental displacement of either of the legs in relation to the otherleg.

Intermediate the ends of the leg 2 there is provided a depression 15,similar to the de- .pression 7, having an opening 16 and a diametricalrib 17 for the reception of the raised protractor 3 and the locking ofthe saine to the rib 17 by the thumb-screw when it is desired to use thedevice as a T-square or a T bevel-square. This feature is very useful,as all the advantages of such use are obtained without anyliability ofloosening of the joint.

In the lleg 1 I provide a plurality of staggered holes 13 for thereception of a scribing implement of any kind to draw a large number ofcircles of dierent diameters, these openings having a certain relationto the scales on the leg 1, so that the usercan immediately draw acircle of the desired radius or diameter, while in the leg 2 a number ofopenings 19 are provided for the inscrihing of circles Whose diametersvary considerably.

The engagement,

IOO

Varioususes to which this device can be put will be obvious to any oneskilled in the art. When the legs are connected together at their ends,the device can be used as amiter-square, as a try-square, and as anordinary square, as a rule and also as a gage and calipers, and variouscircles can be struck, while the implement is adaptable for use as aT-square and a T bevel-square when the leg 1 is connected to the centerof the leg 2.

. I am aware that it has been proposed heretofore to connect the legs ofa mechauics implement of this general character by a screw having apoint projecting and to use holes in the legs, so that the device can beused as a compass,l and I also know that the idea or' connecting one ofthe legs to the other intermediate the ends thereofto provide aT-'square has been proposed heretofore; but, so far as I am aware, I amthe first to provide'the novefl locking-joint on a device 'of thischaracter, whereby vafter adjustment has once been effected thelegs'cannot move in relation to each other, and the provision of thisjoint `intermediate the ends of one of thelegs is also my invention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

In a mechanics combination measuring implement, the combination of twolegs or members, one or' which has a raised circular protractor providedwith a screw-threaded central vopening and grooves radiating therefrom,and the other member having a circular depressed portion receiving theraised protractor and provided with a rib to engage the groovesaforesaid and also having a central opening', and a screw -threadedadjustable member passing through the opening last named and engaged'with the screw-threaded -opening to lock the rib in the grooves.

In testimony whereofl I hereunto aix my signature in presence of twowitnesses.

CHARLES R. WILLIAMS. Witnesses:

R. T. VVEATHERLY, VVALLIE WrLLIA'ivIs.

